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| author | Ganesh Mahendran <opensource.ganesh@gmail.com> | 2016-07-28 15:47:46 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-07-28 16:07:41 -0700 |
| commit | cf675acb743f045b7482384be60987e69260e43d (patch) | |
| tree | dcdea8b15476fbe9e9d07acc68736416c3d4dd27 /mm | |
| parent | 41b88e14c1612be7d4eba18fff1e70d168abe356 (diff) | |
| download | linux-cf675acb743f045b7482384be60987e69260e43d.tar.gz linux-cf675acb743f045b7482384be60987e69260e43d.tar.bz2 linux-cf675acb743f045b7482384be60987e69260e43d.zip | |
mm/zsmalloc: take obj index back from find_alloced_obj
the obj index value should be updated after return from
find_alloced_obj() to avoid CPU burning caused by unnecessary object
scanning.
Link: http://lkml.kernel.org/r/1467882338-4300-2-git-send-email-opensource.ganesh@gmail.com
Signed-off-by: Ganesh Mahendran <opensource.ganesh@gmail.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/zsmalloc.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index 0b4790e81193..49143de9934c 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1741,10 +1741,11 @@ static void zs_object_copy(struct size_class *class, unsigned long dst, * return handle. */ static unsigned long find_alloced_obj(struct size_class *class, - struct page *page, int index) + struct page *page, int *obj_idx) { unsigned long head; int offset = 0; + int index = *obj_idx; unsigned long handle = 0; void *addr = kmap_atomic(page); @@ -1765,6 +1766,9 @@ static unsigned long find_alloced_obj(struct size_class *class, } kunmap_atomic(addr); + + *obj_idx = index; + return handle; } @@ -1790,7 +1794,7 @@ static int migrate_zspage(struct zs_pool *pool, struct size_class *class, int ret = 0; while (1) { - handle = find_alloced_obj(class, s_page, obj_idx); + handle = find_alloced_obj(class, s_page, &obj_idx); if (!handle) { s_page = get_next_page(s_page); if (!s_page) |